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SM1124 Series
NIPPON PRECISION CIRCUITS INC.
Multimelody IC for Pagers
OVERVIEW
The SM1124 Series are melody pager multi-melody ICs fabricated in NPC's Molybdenum-gate CMOS. A maximum of 16 tunes can be stored in programmable ROM, and the Molybdenum-gate CMOS process realizes small-sized packages and low power dissipation.
PINOUT
8-pin SOP
CLK SI SC ST
1
8
VSS VDD MTO
124
FEATURES
s
4
5
TEST
s s
s s s s s s
Maximum of 16 tune selections (with up to 512 steps) Level hold playback mode External reference clock input. The frequency can be selected from the following 12 settings. * Playback frequency of each song varies (8 frequencies) - 32.768 kHz system: 32.768 and 65.536 kHz - 37.5 kHz system: 37.5 and 75.0 kHz - 38.4 kHz system: 38.4 and 76.8 kHz - 48.0 kHz system: 48.0 and 96.0 kHz * Playback frequency of all songs is fixed (4 frequencies) - 32.768 kHz system: 131.072 kHz - 37.5 kHz system: 150.0 kHz - 38.4 kHz system: 153.6 kHz - 48.0 kHz system: 192.0 kHz 2-pin serial data tune selection Power save function External clock gating in non-play mode. 2.4 to 3.6 V supply voltage 8-pin plastic SOP package Molybdenum-gate CMOS process
PACKAGE DIMENSIONS
Unit: mm
4.4 0.2 6.2 0.3
5.2 0.3
0.15- 0.05
+ 0.10
0.05 0.05
1.27 0.4 0.1 0.695TYP
1.5 0.1
0 10
0.4 0.2
NIPPON PRECISION CIRCUITS--1
SM1124 Series
BLOCK DIAGRAM
CLK*
Gate
1/2 or 1/4 Divider 1/128
SW Scale Counter Scale ROM
VSS VDD MTO
SI* SC* ST* Control Circuit
Main ROM
Multiplexer Rhythm Counter
Address Counter
TEST
Tempo Latch Tempo Counter
Start Address Latch
*: Built-in Schmmit-Triger Circuit.
PIN DESCRIPTION
Number 1 2 3 4 5 6 7 8 Name CLK SI SC ST TEST MTO VDD VSS I/O I I I I I O - - Function External reference clock input (Schmitt-trigger circuit and gate circuit built-in) Playback control serial interface data input pin1 Playback control serial interface clock input pin1 Playback start/stop control signal input pin1 Test input pin. Leave open or tie to VSS. (Pull-down resistance built-in) Playback signal output pin Supply pin (+) Ground pin
1. Pins SI, SC and ST have a built-in Schmitt-trigger circuit.
SPECIFICATIONS
Absolute Maximum Ratings
P arameter Supply voltage range Input voltage range Power dissipation Storage temperature range Soldering temperature Soldering time Symbol V DD V IN PD Tstg Tsld tsld Condition Rating -0.3 to 5.0 V SS - 0.2 to V DD + 0.2 150 -40 to 125 255 10 Unit V V mW C C s
NIPPON PRECISION CIRCUITS--2
SM1124 Series
Recommended Operating Conditions
VSS = 0 V unless otherwise specified
Rating P arameter Supply voltage Operating temperature Symbol V DD Topr Condition min 2.4 -20 typ - - max 3.6 70 V C Unit
DC Characteristics
Ta = -20 to 70 C, VSS = 0 V, VDD = 2.4 to 3.6 V unless otherwise specified
Rating P arameter Supply voltage Current consumption (1) Current consumption (2) Symbol V DD IDD1 IDD2 V IH V IL Hysteresis width VT IIH1 Input current IIL1 IIH2 Open voltage Output voltage VOPN VOH VOL ST, SI, SC and CLK pins, V IH = V DD, 25C ST, SI, SC and CLK pins, V IL = 0 V, 25C TEST pin, V IH = V DD TEST pin MTO pin, IOH = 1 mA MTO pin, IOL = 1 mA ST, SI, SC and CLK pins Non-playback mode, 25C Playback mode, MTO pin open Condition min 2.4 - - V DD - 0.2 V SS 0.2 - - - - V DD - 0.4 V SS typ 3.0 - 25 - - 1.0 - - - - - - max 3.6 0.5 200 V DD V SS + 0.2 - 0.5 0.5 200 0.1 V DD V SS + 0.4 V A A V V V A A A V V V Unit
Input voltage
AC Characteristics
Ta = -20 to 70 C, VSS = 0 V, VDD = 2.4 to 3.6 V unless otherwise specified
Rating P arameter CLK pulse cycle CLK HIGH-level pulsewidth CLK LOW-level pulsewidth SC pulsewidth SC HIGH-level pulsewidth SC LOW-level pulsewidth SI-SC setup time SI-SC hold time Symbol tCLK tCWH tCWL tSC tSWH tSWL tDS tDH "Serial input" timing 2.0 - - s "SC input clock" timing "CLK input clock" timing Condition min 5.0 2.0 2.0 5.0 2.0 2.0 2.0 typ - - - - - - - max - - - - - - - s s s s s s s Unit
NIPPON PRECISION CIRCUITS--3
SM1124 Series
CLK input clock
CLK
t CWH t CLK
SC input clock
t CWL
VIH 0.5VDD VIL
SC
t SWH t SC
Serial input
t SWL
VIH 0.5VDD VIL
SC
VIH 0.5VDD VIL t DS t DH VIH 0.5VDD VIL
SI
FUNCTIONAL DESCRIPTION
Control Functions
External reference clock The SM1124 can operate at 12 selectable external reference clock frequencies. Of these, 8 are selectable for each tune. When multiple external clock frequencies are input to a single IC, the clock must be switched during playback mode. Note that when the frequency in parentheses is selected, all tunes can only be played using that single fixed frequency. * 32.768 kHz system: 32.768 kHz, 65.536 kHz, (131.072 kHz) * 37.5 kHz system: 37.5 kHz, 75.0 kHz, (150.0 kHz) * 38.4 kHz system: 38.4 kHz, 76.8 kHz, (153.6 kHz) * 48.0 kHz system: 48.0 kHz, 96.0 kHz, (192.0 kHz) The external reference clock input is used at any time as well as during playback mode. If a clock signal is input when not in playback mode (when ST is LOW), the gate circuit switches to cutoff the external reference clock signal from entering the device, preventing unwanted current flow.
NIPPON PRECISION CIRCUITS--4
SM1124 Series
Input during playback mode only
ST CLK
Input during non-playback mode
ST CLK
Playback control The ST pin controls the start of playback. While ST is HIGH (VDD), the tune is played repeatedly, and when ST goes LOW (VSS), playback stops. Tunes are selected by the input serial data on pins SI and SC. The final 4 bits form the valid selection data, and this data is retained even after playback. If serial data is input during playback, the SM1124 ignores this data and playback continues.
Invalid Data SI SC ST MTO
Valid Data B3 B2 B1 B0
Invalid Data
,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,
* Pin SC should be LOW when either a LOW-to-HIGH or HIGH-to-LOW transition occurs on pin ST.
Serial data selection1
B3 L L L L L L L L B2 L L L L H H H H B1 L L H H L L H H B0 L H L H L H L H ST LH LH LH LH LH LH LH LH Music selection 1st tune 2nd tune 3rd tune 4th tune 5th tune 6th tune 7th tune 8th tune B3 H H H H H H H H B2 L L L L H H H H B1 L L H H L L H H B0 L H L H L H L H ST LH LH LH LH LH LH LH LH Music selection 9th tune 10th tune 11th tune 12th tune 13th tune 14th tune 15th tune 16th tune
1. H = VDD level, L = VSS level
NIPPON PRECISION CIRCUITS--5
SM1124 Series
SI ST MTO
#n1 Data
#n2 Data
#n1 Play
#n1 Play #n1 Play
#n2 Play
*: Tune plays repeatedly when ST is HIGH, and stops immediately when ST goes LOW. Playback timing diagrams
Playback start
Playback starts 128 1 SCK clock cycles after ST goes HIGH.
Invalid Data SI SC ST CLK 128
Internal Clock
MSB
Valid Data
LSB
1 Clock
MTO
,,,,,, ,,,,,,
Playback stop
Playback stops immediately when ST goes LOW. The IC internal clock also stops, regardless of whether or not there is a clock input signal on pin CLK.
ST CLK
Internal Clock
MTO
,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,
NIPPON PRECISION CIRCUITS--6
SM1124 Series
Musical Specifications
Maximum program steps The mask for the built-in ROM can be programmed with up to a maximum of 512 steps, where each step represents either a note (sound pitch and length) or a rest. Note length (including rests) Eight rhythm values for notes (rests) can be programmed. Also, 2 or more notes can be programmed as tied notes using a tie.
0 Note
3 3
1
2
3
4
5
6
7
Rest
3 3
Pitch and scale The SM1124 performs uniform interval length processing to reduce the error at high pitches. This maintains the relative phase when the frequency varies from the input value. The pitch varies with the external reference clock frequency, as shown in the frequency on the following page. The frequency variation from the input frequency is the sum of the relative error, shown in the frequency table, plus the pitch error. (Ex) 38.4 kHz system, A4 note Relative error: 8.99 cent Pitch error: -3.58 cent Total: +5.41 cent Error calculation method: Output frequency log 10 ------------------------------------------------Output frequency Reference frequency 1200 x log 2 ------------------------------------------------- = 1200 x -------------------------------------------------------------Reference frequency log 10 2 Output frequency 3986.3 x log 10 ------------------------------------------------Reference frequency 441.379 3986.3 x log 10 -----------------440.000 5.41 cent
NIPPON PRECISION CIRCUITS--7
SM1124 Series
Frequency tables
Relative error (cent) 2.49 3.50 2.89 0.00 2.88 2.87 -0.93 0.94 -1.96 0.93 -2.21 0.42 -4.50 -3.91 2.89 0.00 2.88 -6.46 8.99 -9.52 -1.96 -10.81 10.29 -12.74 -4.50 10.95 2.89 0.00 2.88 12.26 -10.79 11.47 -1.96 -10.81 -14.62 -12.74 -4.50 10.95 -28.30 0.00 -32.09 12.26 -10.79 -30.25 32.768 kHz system Pitch C3 C#3 D3 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5 G#5 A5 A#5 B5 C6 C#6 D6 D#6 E6 F6 F#6 G6 37.5 kHz system 38.4 kHz system 48 kHz system Pitch C3 C#3 D3 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5 G#5 A5 A#5 B5 C6 C#6 D6 D#6 E6 F6 F#6 G6 G#6 A6 A#6 B6 C7 C#7 D7 Reference frequency 130.8128 138.5913 146.8325 155.5635 164.8138 174.6143 184.9973 195.9978 207.6525 220.0000 233.0820 246.9418 261.6255 277.1825 293.6650 311.1270 329.6275 349.2285 369.9945 391.9955 415.3050 440.0000 466.1640 493.8835 523.2510 554.3650 587.3300 622.2540 659.2550 698.4570 739.9890 783.9910 830.6100 880.0000 932.3280 987.7670 1046.5020 1108.7300 1174.6600 1244.5080 1318.5100 1396.9140 1479.9780 1567.9820 1661.2200 1760.0000 1864.6560 1975.5340 2093.0040 2217.4600 2349.3200
F r e q u e n cy Number divider 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 247 233 220 208 196 185 175 165 156 147 139 131 124 117 110 104 98 93 87 83 78 74 69 66 62 58 55 52 49 46 44 41 39 37 35 33 31 29 28 26 25 23 22 21
F r e q u e n cy F r e q u e n cy F r e q u e n cy F r e q u e n cy Pitch Pitch Pitch (Hz) (Hz) (Hz) (Hz) 132.664 140.635 148.945 157.538 167.184 177.124 187.246 198.594 210.051 222.912 235.741 250.137 264.258 280.068 297.891 315.077 334.367 352.344 376.644 394.795 420.103 442.811 474.899 496.485 528.516 564.966 595.782 630.154 668.735 712.348 744.727 799.220 840.205 885.622 936.229 992.970 1057.032 1129.931 1170.286 1260.308 1310.720 1424.696 1489.455 1560.381 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5 G#5 A5 A#5 B5 C6 C#6 D6 D#6 E6 F6 F#6 G6 G#6 A6 A#6 151.822 160.944 170.455 180.288 191.327 202.703 214.286 227.273 240.385 255.102 269.784 286.260 302.419 320.513 340.909 360.577 382.653 403.226 431.034 451.807 480.769 506.757 543.478 568.182 604.839 646.552 681.818 721.154 765.306 815.217 852.273 914.634 961.538 1013.514 1071.429 1136.364 1209.677 1293.103 1339.286 1442.308 1500.000 1630.435 1704.545 1785.714 D#3 E3 F3 F#3 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5 G#5 A5 A#5 B5 C6 C#6 D6 D#6 E6 F6 F#6 G6 G#6 A6 A#6 155.466 164.807 174.545 184.615 195.918 207.568 219.429 232.727 246.154 261.224 276.259 293.130 309.677 328.205 349.091 369.231 391.837 412.903 441.379 462.651 492.308 518.919 556.522 581.818 619.355 662.069 698.182 738.462 783.673 834.783 872.727 936.585 984.615 1037.838 1097.143 1163.636 1238.710 1324.138 1371.429 1476.923 1536.000 1669.565 1745.455 1828.571 G3 G#3 A3 A#3 B3 C4 C#4 D4 D#4 E4 F4 F#4 G4 G#4 A4 A#4 B4 C5 C#5 D5 D#5 E5 F5 F#5 G5 G#5 A5 A#5 B5 C6 C#6 D6 D#6 E6 F6 F#6 G6 G#6 A6 A#6 B6 C7 C#7 D7 194.332 206.009 218.182 230.769 244.898 259.459 274.286 290.909 307.692 326.531 345.324 366.412 387.097 410.256 436.364 461.538 489.796 516.129 551.724 578.313 615.385 648.649 695.652 727.273 774.194 827.586 872.727 923.077 979.592 1043.478 1090.909 1170.732 1230.769 1297.297 1371.429 1454.545 1548.387 1655.172 1714.286 1846.154 1920.000 2086.957 2181.818 2285.714
+21.84 cent pitch error (Note) A4 is the following note.
-44.64 cent pitch error
-3.58 cent pitch error
-17.26 cent pitch error
A4 (440Hz)
NIPPON PRECISION CIRCUITS--8
SM1124 Series Tempo There are 29 tempos that can be selected for each tune. The tempo varies with the external reference frequency.
Tempo table
RO M Code 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F F r e q u e n cy divider 4 5 6 7 8 9 10 11 Moderato 12 13 14 Andante 15 16 17 18 19 20 Larghetto 21 22 23 24 25 26 27 28 29 30 31 32 Largo 61.0 58.2 55.7 Larghetto 53.3 51.2 49.2 47.4 45.7 Largo 44.1 42.7 41.3 40.0 50.5 48.8 47.3 45.8 Largo 51.7 50.0 48.4 46.9 Largo Larghetto 64.7 62.5 60.5 58.6 61.0 58.6 56.3 54.3 52.3 Larghetto 62.5 60.0 57.7 Adagio 55.6 53.6 69.4 67.0 78.1 75.0 72.1 Adagio 69.8 66.6 63.7 Adagio 71.4 68.2 65.2 Andante 89.3 85.2 81.5 Adagio 85.3 80.0 Andante 75.3 71.1 67.4 64.0 86.2 81.4 77.1 73.2 Andante 88.2 83.3 78.9 75.0 97.7 91.6 100.0 93.8 Moderato 110.3 104.2 98.7 93.8 125.0 117.2 106.7 98.5 91.4 Moderato 122.1 112.7 Moderato 104.6 107.1 125.0 115.4 Allegro 133.9 156.3 144.2 Allegro Presto Prestissimo 32.768 kHz system Te m p = 320.0 256.0 Prestissimo 213.3 182.9 160.0 142.2 128.0 Allegro 116.4 133.2 Presto 244.1 209.3 183.1 162.8 146.5 Allegro 136.4 Presto 37.5 kHz system Te m p = 366.2 293.0 Prestissimo 250.0 Prestissimo 214.3 187.5 166.7 150.0 Presto 170.5 267.9 234.4 208.3 187.5 312.5 38.4 kHz system Te m p = 375.0 300.0 48 kHz system Te m p = 468.8 375.0
Quarter note ( ) length = 1536 x tempo counter frequency divider / CLK frequency (Ex) Tempo code = 1F (divider = 32), CLK frequency = 32.768 kHz 1536 x 32 / 32768 = 1.5 (seconds)
NIPPON PRECISION CIRCUITS--9
SM1124 Series
TYPICAL APPLICATION
Speaker drive with switching circuit
1.5V 2.4 to 3.6V R2 R3 SW1 SP
SM1124
VDD CLK SI VSS VDD MTO TEST
R1 Q1
DC-DC Converter
CPU
VSS
SC ST
For example Q1: hfe 100 MIN SP: Impedance 16 MIN R1: 1.2k R2, R3: to be decided by sound volume
Speaker drive with Linear amplifier
1.5V 2.4 to 3.6V
SM1124
VDD CLK SI VSS VDD MTO TEST
VR1 C1
VCC IN OUT
DC-DC Converter
CPU
VSS
+
C2 SP
SC ST
GND
For example VR1: 10k MIN (As the output impedance of MTO terminal is up to 1k MAX, the value above is given under the condition that output shall be over 90% of supply voltage amplitude. If it is set below 10k, output amplitude becomes smaller.) C1: to be decided by Input impedance of amplifier. C2, SP: to be decided by Output impedance of amplifier.
NIPPON PRECISION CIRCUITS INC. reserves the right to make changes to the products described in this data sheet in order to improve the design or performance and to supply the best possible products. Nippon Precision Circuits Inc. assumes no responsibility for the use of any circuits shown in this data sheet, conveys no license under any patent or other rights, and makes no claim that the circuits are free from patent infringement. Applications for any devices shown in this data sheet are for illustration only and Nippon Precision Circuits Inc. makes no claim or warranty that such applications will be suitable for the use specified without further testing or modification. The products described in this data sheet are not intended to use for the apparatus which influence human lives due to the failure or malfunction of the products. Customers are requested to comply with applicable laws and regulations in effect now and hereinafter, including compliance with export controls on the distribution or dissemination of the products. Customers shall not export, directly or indirectly, any products without first obtaining required licenses and approvals from appropriate government agencies. NIPPON PRECISION CIRCUITS INC. 4-3, Fukuzumi 2-chome Koto-ku, Tokyo 135-8430, Japan Telephone: 03-3642-6661 Facsimile: 03-3642-6698 NC9503AE 1996.01
NIPPON PRECISION CIRCUITS INC.
NIPPON PRECISION CIRCUITS--10

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